Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Squareness Estimation for Coordinate Measuring Machine Using the Laser Interferometer Measurement Based on the Face-Diagonal Method

Face-Diagonal 방법 기반의 레이저 간섭계 측정을 이용한 CMM 의 직각도 추정

  • Lee, Hoon Hee (Department of Mechanical Engineering, Kyungpook National University) ;
  • Lee, Dong Mok (Institute of Mechanical Engineering Technology, Kyungpook National University) ;
  • Yang, Seung Han (Department of Mechanical Engineering, Kyungpook National University)
  • Received : 2015.09.10
  • Accepted : 2015.12.29
  • Published : 2016.04.01
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Abstract

The out-of-squareness is one of the error sources that affect the positioning accuracy of machine tools and coordinate measuring machines. Laser interferometer is widely used to measure the position and angular errors, and can measure the squareness using an optical square. However, the squareness measurement using the laser interferometer is difficult, as compared to other errors due to complicated optics setup and Abbe's error occurrence. The effect of out-of-squareness mainly appears at the face-diagonal of the movable plane. The diagonal displacements are also affected by the position dependent geometric errors. In this study, the squareness estimation techniques via diagonal displacement measurement using the laser interferometer without an optical square were proposed. For accurate estimation and measurement time reduction, the errors selected from proposed discriminant were measured. Discrepancy between the proposed technique with the laser interferometer (with an optical square) result was $0.6{\mu}rad$.

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References

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  1. Face- and Body-Diagonal Length Tests using a Double Ball-Bar for Squareness Errors of Machine Tools vol.19, pp.7, 2018, https://doi.org/10.1007/s12541-018-0123-y